Gear ratio & clutch recommendation

Rory McNeil · 01-30-2016, 02:52 AM

Obviously, gear ratio will be dependent on the kind of RPM you will be spinning. My 85 Mustang is a legal Stocker, but for the past couple of years, I have had a 331 SB Ford bracket engine. Its a flat tappet cam/pump gas engine. My Jerico has a 3.19 1rst gear, and 4.88 rear gears, and 9x29 Hoosier D07 slicks. At 3050 lbs, it runs 10.4s @128MPH, shifting at 6800 RPM, hitting 7200 thru the traps. If your engine will rev a lot higher, naturally you can use more rear gear, and depending on the engine, may want less 1rst gear than what I use.

01-30-2016, 02:52 AM	#3
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 317 Liked 1,105 Times in 303 Posts	Re: Gear ratio & clutch recommendation Obviously, gear ratio will be dependent on the kind of RPM you will be spinning. My 85 Mustang is a legal Stocker, but for the past couple of years, I have had a 331 SB Ford bracket engine. Its a flat tappet cam/pump gas engine. My Jerico has a 3.19 1rst gear, and 4.88 rear gears, and 9x29 Hoosier D07 slicks. At 3050 lbs, it runs 10.4s @128MPH, shifting at 6800 RPM, hitting 7200 thru the traps. If your engine will rev a lot higher, naturally you can use more rear gear, and depending on the engine, may want less 1rst gear than what I use. __________________ NHRA 6390 STK M/S 85 Mustang